Improvement in pumps



ed A 5mm @anni @fr/e. e

C. H. -DREYER, OF NASH-VILLEVTENN SSEE. 4Leum Patent No. 83,051, dem october 13,1868. i

IMPROVEIWENT IN PUMIPSL -Y Q-*M The Schedule referred to in these Letters Patent and making part of th same.

*Mor-.

To all whom, fitmay concern:

Be it known that I, C. H. DREYER, of Nashville, in

the county of Davidson, and State of Tennessee, have invented new and useful Improvements in Pumps; and I do hereby declare that the following is a full, clear, and exact description thereof, which enable those skilled in the art to'make and use the same, reference being had to the accompanying drawings, forming part of this specification.

This invention relates to improvements in pumps, the object of which is to provide an improved doublea@fing pump- It consists in the arrangement of the valves and passages in the stationary piston of a pump whose cylinder is movable. y

Figure l represents a sectional elevation of my improved pump, the section of the plunger being takenl on the line :v a: of fig. 3;

Figure 2 represents a section of the plunger, taken on the lineyyof g. 3;

Figure 3 represents a plan view of the cap of the piston; and

Figure 4 represents a plan view of the lower p0rtion of the piston. f i Similar letters of reference indicate 'corresponding parts.

A represents a cylinder, arranged to be reciprocated -on the xed hollow piston-rod B, and provided with a stuiiing-box at each end.'

Within the cylinder, the rod-is provided with a fixed piston, constructed in two parts, D and E.

The lower face of the cap is chambered out at four equidistant points around the centre'for the reception of the four valves, a b and c d, working on the face of Vthe part E, two of which, a and c, alternately open and close communication with the lower portion of the piston-rod F, while d is arranged to govern the passage, from the lower portion of thecylnder to the exhaust, and b the passage from the upper portion of the cylinder to the exhaust-portion G of the piston. y

e and f representpassages from the valve-face of the part E of the piston to the lower part of the cyl-l inder, to conduct the water thereto when received through the valve a.

g, h, and fi, represent passages through vthe upper part D of the valve, to conduct the water to the upper part of theA cylinder when received through the valvec.

k and l represent passages leading through the top, D, ofthe piston, and communicating with corresponding chambers in the part E, leading to the space in the latter under the valve b.

According to this arrangement, when the cylinder is moved in a downward direction, the Water will be dravm from the tube F under the valve a, which will be raised,'and through Vthe passages e and f into the lower portion of thev said cylinder, while the water which is in the upper vpart of the cylinder will be forced down through the passages It and l, raising the valve b, and passing into the `exhal'ist-tube G, and, when the cylinder is raised in an upward direction, the water will be raised through the valve c, and the passages gh fi, into the'upper portion, While the water in the lower part of the said cylinder will be forced up through the valve d and into the exhaust-tube B.

This-arrangement admits of a veryv'simple and cheap construction of 'the valves and passages, while it forms a very reliably-operating pump.

I claim as new, and desire to secure by Letters .Patent- TheA fixedpiston D E; constructed of two parts, and provided with the valves a and b, c and d, and their passages e j' g, and h fi, leading to the lower and upper parts of the cylinder, and the passages k l, all substantially as and-for the purpose described;

The above specification of my invention signed by me, this 18th day of August, 1868. i O. H. DREYER.

Witnesses:

E. B. Vnnonnn, JOHN Q. ADAMS. 

